This workshop service repair manual covers SISUDiesel engines, specifically models 320, 420, 620, and 634. These diesel engines are engineered for demanding applications, emphasizing robust construction and reliable performance. Designed for service and repair, they represent a commitment to durable and efficient operation in various industrial and heavy-duty environments.

This comprehensive English-language manual provides essential information for the maintenance and repair of your SISUDiesel engine. It details critical procedures, troubleshooting guidance, and technical specifications necessary for optimal performance and longevity. By following the instructions within this manual, owners and technicians can ensure the continued reliability and efficiency of their SISUDiesel engines.